Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Is it possible to estimate a light source wattage remotely?

  1. Apr 25, 2016 #1
    I'd like to know if it's possible to roughly estimate a light source wattage remotely, knowing the distance and perhaps estimating that at such a distance it's still above the minimum human recognizable threshold at night (in a light polluted area).

    Maybe using a DSLR camera could help by checking on computer the value difference between "dark" (actually soil, which should still have some reflectange given by light pollution) and "light" pixel values?

    Thank you
     
  2. jcsd
  3. Apr 25, 2016 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    Yes it is ... this is how the power output of stars is figured out.
    You need a decent model for how the source emits light, and some measure of how much light is arriving.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Is it possible to estimate a light source wattage remotely?
  1. Light source (Replies: 3)

  2. Point light source (Replies: 5)

Loading...